Numbers / 881

The Number 881

881 is prime: only 1 and 881 divide it evenly; the next prime after 881 is 883. 881's proper divisors total just 1, 880 short of 881, the deficient case most of 881's neighbors share too. 881 has a digit sum of 17; for 881, the digital root works out to 8. 881 shares no factor with 2-12; 881's own divisors start beyond that range. 881 is 1101110001 in binary and 371 in hex; as a Roman numeral it's DCCCLXXXI.